Check of a gap between a core and the directing plug of the valve is made in two ways.

Fig. 2.120. Check of a gap between cores and the directing plugs of valves (the first way)

Raise a valve head on 25 mm, then measure by the indicator movement of the valve in the direction of arrows at an angle 90 ° to a camshaft axis. A half of the received size is equal to value of a gap between a core and the directing plug of the valve (fig. 2.120).

Measure diameter of a core of the valve and internal diameter of the directing plug.

Fig. 2.121. Check of a gap between cores and the directing plugs of valves (the second way)

Gap size between the directing plug and a core of the valve, is calculated by subtraction of sizes of two measured diameters (fig. 2.121).

Nominal gap:

– for inlet valves – 0,015–0,048 mm;

– for final valves – 0,029–0,062 mm.